On a family trip to Cuba, Grampa Simpson becomes depressed and unwilling to partake in activities. He cheers up when he spots an old American car from his times and goes for a ride in it with a native Cuban. Both during and after the ride, Grampa feels reinvigorated and connected with his youth. The Cuban resident references a study conducted by Ellen Langer in which seniors felt young again once exposed to objects from their youth.
Rolf is homesick, and the Eds come up with a plan to make him believe he's in his home country. Rolf's homesickness was so severe that it takes a while for him to recognize that the village is makeshift.
After finally getting her memory back, Allie quickly falls into a state of confusion and reacts harshly to Noah. Upon realizing she's lost her memory, Noah breaks down into tears as the nurses attempt to calm Allie down.